Add http logger Chinese docs

doc/plugins/http-logger-cn.md

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+# limitations under the License.
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+-->
+
+# Summary
+- [**定义**](#name)
+- [**属性列表**](#attributes)
+- [**如何开启**](#how-to-enable)
+- [**测试插件**](#test-plugin)
+- [**禁用插件**](#disable-plugin)
+
+## 定义
+
+`http-logger` 是一个插件，可将Log数据请求推送到HTTP / HTTPS服务器。
+
+这将提供将Log数据请求作为JSON对象发送到监视工具和其他HTTP服务器的功能。
+
+## 属性列表
+
+|属性名称          |必选项  |描述|
+|---------     |--------|-----------|
+| uri |必要的| 服务器的URI |
+| authorization |可选的| 授权头部 |
+| keepalive |可选的|发送请求后保持连接活动的时间|
+| name |可选的|标识logger的唯一标识符|
+| batch_max_size |可选的|每批的最大大小，默认为1000|
+| inactive_timeout |可选的|刷新缓冲区的最大时间（以秒为单位），默认值为5s|
+| buffer_duration |可选的|必须先处理批次中最旧条目的最长期限（以秒为单位），默认值为5|
+| max_retry_count |可选的|从处理管道中移除之前的最大重试次数，默认为0|
+| retry_delay |可选的|如果执行失败，则应延迟执行流程的秒数，默认为1|
+
+## 如何开启
+
+1. 这是有关如何为特定路由启用http-logger插件的示例。
+
+```shell
+curl http://127.0.0.1:9080/apisix/admin/routes/5 -H 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' -X PUT -d '
+{
+      "plugins": {
+            "http-logger": {
+                 "uri": "127.0.0.1:80/postendpoint?param=1"
+            }
+       },
+      "upstream": {
+           "type": "roundrobin",
+           "nodes": {
+               "127.0.0.1:1980": 1
+           }
+      },
+      "uri": "/hello"
+}'
+```
+
+## 测试插件
+
+* 成功:
+
+```shell
+$ curl -i http://127.0.0.1:9080/hello
+HTTP/1.1 200 OK
+...
+hello, world
+```
+
+## 禁用插件
+
+在插件配置中删除相应的json配置以禁用http-logger。APISIX插件是热重载的，因此无需重新启动APISIX：
+
+```shell
+$ curl http://127.0.0.1:2379/apisix/admin/routes/1 -X PUT -d value='
+{
+    "methods": ["GET"],
+    "uri": "/hello",
+    "plugins": {},
+    "upstream": {
+        "type": "roundrobin",
+        "nodes": {
+            "127.0.0.1:1980": 1
+        }
+    }
+}'
+```